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NTIS

01/01/1988

Collation

124 pages : illustrations ; 28 cm

Abstract

A full scale rapid infiltration wastewater treatment system consisting of four basins averaging 89 x 465 m. The hydraulic loading of 90 m/year was achieved by operating the basins in pairs with two weeks of wetting and two weeks of drying when secondary effluent with 10-15 mg/l suspended solids was applied. The hydraulic loading was drastically reduced when the suspended solids increased to 50-100 mg/l (mostly as algae) following detention in a stabilization pond. The renovated water typically contained 750 mg/l dissolved solids, 0.9 mg/l suspended solids, 7 mg/l nitrogen (mostly nitrate), 0.25 mg/l phosphate-phosphorus, 20 fecal coliform per 100 ml, 1 virus PFU per 100 l and 2 mg/l total organic carbon. The organic compounds included trihalomethanes, chlorinated aliphatic and aromatic hydrocarbons, pesticides, and plasticizers.

Notes

Cover title. "EPA-Project S-802435" "September 1981" "EPA-600/2-82-080." "This study was a cooperative project between the City of Phoenix and the U.S. Water Conservation Laboratory, U.S. Department of Agriculture." PB82-252941 Includes bibliographical references (p. 123-124). Microfiche.